摘要
为探究MEKOH(丁酮肟盐酸盐)的热危险性,开展一系列基础量热实验进行热力学研究。通过DSC(差示扫描量热法)获得热分解反应特性,并利用FWO(Flynn-Wall-Ozawa)法来进行动力学计算,求解MEKOH的活化能。通过TG(热重实验),得到MEKOH的热质量损失数据,了解其加热过程中的质量变化。利用ARC(绝热加速量热法)进行绝热环境下的量热实验,掌握MEKOH的放热特性。结果表明:随着升温速率的提高,初始分解温度和分解的峰值温度也随之提高,平均比放热量为749.01 kJ/kg,分解热评估等级为2级,分解放热量较大,潜在爆炸危险性较高。MEKOH在30℃左右质量开始减少,于150℃左右质量损失曲线趋于平缓,质量损失的第1阶段没有热量变化,第2阶段发生分解放热。在绝热测试的全程中MEKOH只有一个放热阶段,初始放热温度为107.6℃。
In order to explore the thermal hazard of butanone oxime hydrochloride,a series of basic calorimetric experiments were carried out to study the thermodynamics.Differential scanning calorimetry was used to obtain the thermal decomposition reaction characteristics,and FWO(Flynn-Wall-Ozawa)method was used to perform kinetic calculations to solve the activation energy of MEKOH.Thermal mass loss data of MEKOH were obtained through thermogravimetric experiment to understand the mass change during heating.The calorimetric test in adiabatic environment was carried out by adiabatic accelerated calorimetry to master the exothermic characteristics of MEKOH.The results show that with the increase of heating rate,the initial decomposition temperature and decomposition peak temperature of MEKOH also increase.The average specific heat release is 749.01 kJ/kg,and the decomposition heat evaluation grade is grade 2,indicating that the heat of MEKOH decomposition is large and the potential explosion risk is high.The mass of MEKOH begins to decrease at about 30℃,and the mass loss curve tends to be gentle at about 150℃.There is no heat change in the first stage of MEKOH mass loss,and the second stage produces the phenomenon of decomposition and heat release.In the adiabatic test,MEKOH has only one exothermic stage,and the initial exothermic temperature is 107.6℃.
作者
黄勇
张玉雯
郝景丽
HUANG Yong;ZHANG Yuwen;HAO Jingli(School of Safety Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2024年第3期90-94,共5页
Chemical Engineering(China)
基金
2021年江苏省重点研发计划(社会发展)项目(BE2021641)。
关键词
丁酮肟盐酸盐
热危险性
热力学
热分解
放热
MEKOH
thermal hazard
thermodynamics
thermal decomposition
heat release
作者简介
黄勇(1978-),男,博士,高级工程师,主要从事化工安全、防火防爆技术等方面的研究,E-mail:huangyong001@cczu.edu.cn。
